Kamis, 04 Februari 2016
Sampling The Sector
One of the best things for me is when my two obsessions find common ground, then I can really geek out. this is probably why Ive latched on well to panel carving, Its a drug that feeds both of my obsessions.
One thing I have always wondered about with medieval woodcraft is measuring, before standard empirical measurements. I get the idea of story sticks or string with knots at regular spaces. I understand the concept of measuring by finger, hand, and foot. I also get judging by eye and having a working knowledge of how proportions should work. I have played with all these things but there seemed like there was a missing piece to all of these, and I had my suspicions the mystery was contained in a pair of dividers.
I get the basics of a pair of dividers, transferring measurements and scratching arcs and circles, but I have always suspected that was only scratching the surface. Ive never made it to Woodworking in America, but I know George Walker has taught a class there that connects the use of dividers to design furniture and I wish I could attend for that class most of all. (There are lots of other good reasons I with I could attend)
I gathered from the article that while one sector is functional, a pair of them can be very versatile. One about twice the size of the other. I chose a width for the larger sector and proceeded to rip the width from the narrow stock after marking it out with a marking gauge.
As I worked along I made myself pretty happy, a couple years ago when I started changing my game plan to hand tools theres no way I would have been able to pull off ripping a half inch off a board with a D-7. Now it really didnt seem like a big deal. After sawing I planed the edges first with my #6 for flatness followed by my #3 for smoothness.
Now I had a good ol pair of sticks to make the longer sector.
The shorter sector could be thinner dimensions so I ripped the two sides from one shorter section of stock.
Toplins sector puts the hinges on the endgrain. I know hes probably smarter than me and theres gotta be a reason for it, but I had to go with what felt right to me and that was sinking the screws into side grain. This meant creating a little recess so the hinge will lay flush once installed
Then there comes the knife work breaking the sides into 13 equal sections. I cheated a little and used inch measurements for both sectors, The smaller sector has 13 divisions spaced at an inch and the larger has them at two inches. I measured them out and knifed the lines both on the top, then on the inside of the legs.
A very fine Sharpie pen was put to work darkening all the knife lines.
While I was working away I got to thinking about the layout squares I started building about this time last year and the decorative molding cut outs on the Roubo Square and English Layout Square and how they help make the tool attractive and increase the pleasure I get working with them. I decided to repeat the experience here with these sectors. I cut these ovolo silhouettes on the distal ends of the legs on both pair.
Towards the hinge end of the smaller I rasped out these simple covetto silhouettes.
And the hinge end of the larger sector received this bead detail.
Then came the time to number them one to thirteen. One the smaller I used standard Arabic numerals.
On the larger I decided to change it up and use Roman numerals. No particular reason, a little romance thats all.
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